raa rac rad rae ral ran rao rap rar ras rat rca rcc rcd rce rcl rcn rco rcp rcr rcs rct rda rdc rdd rde rdl rdn rdo rdp rdr rds rdt re- rea rec red ree rel ren reo rep rer res ret rla rlc rld rle rll rln rlo rlp rlr rls rlt rna rnc rnd rnn rno rnp rnr rns rnt roa roc rod roe rol ron roo rop ror ros rot rpa rpc rpd rpe rpl rpn rpo rpp rpr rps rpt rra rrc rrd rrl rrn rrp rrr rrs rrt rsa rsc rsd rse rsl rsn rso rsp rsr rss rst rta rtc rtd rte rtl rtn rto rtp rtr rts rtt saa sac sad sae sal san sao sap sar sas sat sca scc scd sce scl scn sco scp scr scs sct sda sdc sdd sde sdl sdn sdo sdp sdr sds sdt se- sea sec sed see sel sen seo sep ser ses set sla slc sld sle sll sln slo slp slr sls slt sna snc snd sne snl snn sno snp snr sns snt soa soc sod soe sol son soo sop sor sos sot spa spc spd spe spl spn spo spp spr sps spt sr- sra src srd sre srl srn sro srp srr srs srt ss- ssa ssc ssd sse ssl ssn sso ssp ssr sss sst sta stc std ste stl stn sto stp str sts stt taa tac tad tae tal tan tao tap tar tas tat tca tcc tcd tce tcl tcn tco tcp tcr tcs tct tda tdc tdd tde tdl tdn tdo tdp tdr tds tdt te- tea tec ted tee tel ten teo tep ter tes tet tla tlc tld tle tll tln tlo tlp tlr tls tlt tna tnc tnd tne tnl tnn tno tnp tnr tns tnt to- toa toc tod toe tol ton too top tor tos tot tpa tpc tpd tpe tpl tpn tpo tpp tpr tps tpt tra trc trd tre trl trn tro trp trr trs trt tsa tsc tsd tse tsl tsn tso tsp tsr tss tst tta ttc ttd tte ttl ttn tto ttp ttr tts ttt